HP9100B: transistor specs needed

[isanchez]

(04-18-2016 03:45 PM)jebem Wrote:  

(04-18-2016 01:51 PM)isanchez Wrote:  THank you all!!
I am going to start searching...
I keep you inofrmed if I succed!

Kind regards

Ignacio

What about the available service manual and schematics?
It should be possible to identify exactly what is the PCB with those suspected transistors, and from there we can now identify the transistor (PNP or NPN) type and function.

link1
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Dear JEbem,

it seems clear now: it is board 09100-66509 left board (qualifier)...it states: "all transistors 5080-4663, except where specified"...looking at the diagram, this type of transistor is PNP type...The HP part is 1853-0203...I am going to try with an equivalent.

Now I believe I can reach the spare.

Again, you are incredible. I thank you all for your help

Kind regards
Ignacio